Question about 2007 Chevrolet Equinox LS New Cars

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2007 Equinox...we repeated spark plug failures. Extreme "Chugging" under load. 5 seperate times..Is this a common issue with these vehicles? What is the cause? GM denies anything is wrong.

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I have had similar issues for the past few months, but each time I took my vehicle in, the problem would not repeat during their test drive. I took my vehicle in this past Friday, and I was told that GM had just released some information on a possible problem with spark plugs. A part had to be ordered, but I anticipate having it fixed later this week. All at no cost. You might check with your local retailer again.

Posted on Feb 07, 2011

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What would cause a coil to burn out on a Mazda Tribute 05 v6


Ignition coils fail due to bad spark plugs or plug wires. Another potential cause is heat and vibration, which can damage the ignition coil's windings and insulation. If an engine is experiencing repeated coil failures, the underlying cause may be resistance from worn spark plugs or excessive spark plug gap. And in rare cases, the failure may be due to a lean fuel condition caused by leaky valves.

With coil on plug (COP) type coils, the rubber insulation dries up (over time and heat from the engine) and cracks and will arc across the engine's metal- shorting out. (Electricity seeks the path of least resistance)

By design, coils take low voltage energy from the battery (12-Volts dc) and transform that energy into a very high voltage charge (in the range of 30,000 to 35,000 volts) to energize the spark plugs which in turn ignites the fuel.

If a spark plug or plug wire is open or has excessive resistance, the ignition coil's output voltage can shoot higher (above the max threshold of 35,000 volts) and burns through the coil's internal insulation, causing a short.

When a coil failure occurs, the coil's voltage output drops, and the engine may not start or may misfire badly when under load.

Extreme caution should be exercised when handling coil packs that are energized- a lethal dose of voltage can arc across the air into the body. So don't touch them when the engine is running!

As stated earlier, if you need to replace the COP, replace the spark plug too, make sure the spark plug is properly gapped.

You can read more about coils here:

Ignition Coil High Voltage Display

Feb 05, 2017 | 2005 Mazda Tribute

2 Answers

Ihave a 2011 equinox. The ac panel stoped working. I checked all fuses inside and out. Is there a relay thac controls this?


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Was there a bulletin issued to extend a warranty for spark plug wires, maybe #10250


Yes....10 years or 120,000 miles
Condition
Some customers of 2007-2009 model year Chevrolet Equinox and Pontiac Torrent vehicles equipped with a 3.4L engine (LNJ), and 2008 Chevrolet Express, Silverado; GMC Savana, Sierra vehicles equipped with a 4.3L engine (LU3) may comment about rough engine operation and the illumination of the Check Engine Light. This may be caused by spark plug wire boots that do not provide a sufficiently robust dielectric seal to withstand the high voltage required to fire the spark plugs.
Special Coverage Adjustment
This special coverage covers the condition described above for a period of 10 years or 120,000 miles (193,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. Dealers are to replace all spark plug wires and, if necessary, the spark plug. The repairs will be made at no charge to the customer. For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after January 5, 2011, are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to January 5, 2011, must be submitted to the Service Contract provider.
Vehicles Involved
Involved are 2007-2009 model year Chevrolet Equinox and Pontiac Torrent vehicles equipped with a 3.4L engine (LNJ), and 2008 Chevrolet Express, Silverado; GMC Savana, Sierra vehicles equipped with a 4.3L engine (LU3).

Mar 03, 2015 | 2007 Chevrolet Equinox LT1

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Car sputters and engine light flashes


Usually The Most Common Cause Of This Is Either A Cracked Spark Plug, Generally #1 or #5 But All Can Do It. Remove The Spark Plugs & Inspect For Carbon Tracking( It Will Be A Dark Line Vertically Located On The White Porceline Part Of The Spark Plug), If You Find This, Replace The Plug & Wire & Apply Dielectric Grease To The Spark Plug Boot.

Next Most Common Issue Is A Failled Head Gasket, Again Most Common On The Rear Cyl Bank. This Requires An Extensive & Expensive Engine Repair.

Sep 09, 2010 | 2009 Chevrolet Equinox

1 Answer

I have a 4.3 and 5 speed 4x4, the engine will miss under load, new gas tank and sending unit installed, looking at replacing fuel filter, any other ideas?


If you are missing, due to a cylinder failure, the fuel filter, sending unit and all of that affect all of the engine. If you get a "skip" under a load, you have a cylinder issue. You need to determine what cylinder. Try to throttle it up while applying the brake to keep it from moving in drive to see if you can get it to skip.
If it does, look at spark plugs to see if you can see what cylinder looks different.
Or...while someone is "power braking" and it's missing, remove a spark plug wire one at a time to see if the condition changes. If it doesn't change, that is your bad cylinder.
Then you need to determine if it's fuel, or spark that is the problem.
(Injector bad, or plug, or plug wire.)

Jan 11, 2010 | 1995 GMC Sierra

2 Answers

Randome misfire on all cylinders only under load p0300 2007 chevy equinox ls 3.4l


Try putting in bosch spark plugs with the 3 electrodes ,might help .As for the code reading well i wouldnt trust that because as its a new car then the chances are its encrypted software so the code you have will not be right.If the plugs do not cure it then its dealer only and i wouldnt be surprised if it didnt end up with a new ECU unit

Dec 12, 2009 | 2007 Chevrolet Equinox LS New Cars

1 Answer

Engine Performance problem 2002 Ford F150 V8


Hello Bret.
These codes are indicating engine misfires. 303 is cylinder #3 and 304 is cylinder #4. The 316 indicates that the misfire happened in the first 1000 revolutions.
These trucks are notorious for misfires. The most common issue is ignition coil failure. Failure on these coils can be accelerated though by spark plugs that are worn and contamination from oils, antifreeze leaks and water.
If it has been some time since you have replaced the spark plugs this may be an opportune time to do so. This job isn't for the faint of heart or those with little patience. Some of the coils and plugs are difficult to access, especially #7 and # 8. I also recommend torquing the spark plugs properly as there are some thread stripping issues on the spark plug threads with these engines.
Have at least 2 new coil assembly's for the two cylinders that are misfiring and be prepared to find at least one more that looks poor. I have used some aftermarket coils but have had issues with them. Ford has reduced the price on their coils to reflect a more fair market value so I would use those.
Have a look for any contamination issues and repair those to prevent future problems.
Hope this helps you along.

Nov 21, 2009 | Ford F-150 Cars & Trucks

1 Answer

Car problem


What does your spark plug look like when you took it out? Was it black/fouled out? If so, you may have bad rings on that piston/cylinder allowing crankcase oil into your cyclinder, thus fouling out your plug.

Jun 11, 2009 | 2007 Chevrolet Equinox LS New Cars

1 Answer

Nissan Terrano Chugging


When you are going up a hill, the engine is under an incresed load - requiring more fuel and spark, so I'd first check all of the ignition related items (Plugs/wires/cap/rotor), and it isn't a bad idea to replace the fuel and air filters if you haven't in a while. Once those are checked, it is very very common for a TPS (Throttle Position switch) to develop "dead spots"; where under accelleration they cause a "chugging", which sometimes is quite unnoticable - unless/until vehicle is under a load ( eg. driving up a hill). A new TPS can be installed and set with a multi-meter - probes attached to the proper terminals, and have the output voltage set at .47V to .50 V at idle (Closed throttle). I'd bet this is the cause, as they usually do not set a DTC (Code - Service Engine light) . It isn't 100% for sure, an air flow meter and/or other things can cause this type thing as well (also a weak spark or coil, etc), but highly unlikely - other malfunctioning parts often set trouble codes as well, and usually either malfunction or they don't. Hope this helps and if you find anything else - please let me know.
DD

Dec 31, 2008 | 1997 Nissan Pathfinder

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